this device has 2GB internal memory, no sd card slot,
it came with 9.051 official navcore, but i updated now to 9.057 - latest official navcore, with updateing navcore were updated linux version and bootloader to these versions bellow

BootLoaderVersion=55274
LinuxVersion=541764

like you can see it's serial number starts with XM, i hope these informations will be useful for your project, and thank you very much for your great work!